# def f(n):
#     if n == 1:
#         return 1
#     return n * f(n - 1)
#
#
# print(f(2023) / f(2020))
sp = [0] * 2024
sp[1] = 1
for i in range(2, 2024):
    sp[i] = i * sp[i-1]
print(sp[2023]/sp[2020])